This post was published long before the Mists of Pandara Expansion.
The tips and techniques explained here may be outdated.

Visual Cue

*Annoyed* About half way through a non-instant cast my toon stops doing the casting animation. I use visual cues so I keep trying to re-cast the spell even though I’m actually in the middle of casting it. *Harumph*

I’ve observes this on both Lilac (Shadow Bolt, Immolate) and on Tatia (heals and resurrections). Very annoying.

I’m seeing this while crafting, mounting, hearthing. Haven’t noticed it on my Hunter in battle, nor on my Priest–but I’ll check again with the priest. And yes, it’s aggravating as hell: I cut a bunch of unnecessary gems because I kept hitting “Create” in Advanced Tradeskill Window and didn’t realize it until after I hit the “Process Queue” button.